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/*
* Copyright (C) ST-Ericsson SA 2010
*
* Author: Rabin Vincent <rabin.vincent@stericsson.com> for ST-Ericsson
* Author: Lee Jones <lee.jones@linaro.org> for ST-Ericsson
* License terms: GNU General Public License (GPL) version 2
*/
#include <linux/platform_device.h>
#include <linux/io.h>
#include <linux/clk.h>
#include <linux/mfd/dbx500-prcmu.h>
#include <linux/mfd/db8500-prcmu.h>
#include <linux/mfd/db5500-prcmu.h>
#include <linux/clksrc-dbx500-prcmu.h>
#include <linux/sys_soc.h>
#include <linux/err.h>
#include <linux/slab.h>
#include <linux/stat.h>
#include <linux/of.h>
#include <linux/of_irq.h>
#include <linux/delay.h>
#include <asm/hardware/gic.h>
#include <asm/mach/map.h>
#include <mach/hardware.h>
#include <mach/setup.h>
#include <mach/devices.h>
#include <mach/reboot_reasons.h>
#include <mach/pm.h>
#include "clock.h"
void __iomem *_PRCMU_BASE;
static const struct of_device_id ux500_dt_irq_match[] = {
{ .compatible = "arm,cortex-a9-gic", .data = gic_of_init, },
{},
};
/*
* The reboot reason string can be 255 characters long and the memory
* in which we save the sw reset reason is 2 bytes. Therefore we need to
* convert the string into a 16 bit pattern.
*
* See file reboot_reasons.h for conversion.
*/
static unsigned short map_cmd_to_code(const char *cmd)
{
int i;
if (cmd == NULL)
/* normal reboot w/o argument */
return SW_RESET_NO_ARGUMENT;
/* Search through reboot reason list */
for (i = 0; i < reboot_reasons_size; i++) {
if (!strcmp(reboot_reasons[i].reason, cmd))
return reboot_reasons[i].code;
}
/* No valid Reboot Reason found */
return SW_RESET_CRASH;
}
void ux500_restart(char mode, const char *cmd)
{
unsigned short reset_code;
reset_code = map_cmd_to_code(cmd);
prcmu_system_reset(reset_code);
mdelay(1000);
/*
* On 5500, the PRCMU firmware waits for up to 2 seconds for the modem
* to respond.
*/
if (cpu_is_u5500())
mdelay(2000);
printk(KERN_ERR "Reboot via PRCMU failed -- System halted\n");
while (1)
;
}
void __init ux500_init_irq(void)
{
void __iomem *dist_base;
void __iomem *cpu_base;
if (cpu_is_u5500()) {
dist_base = __io_address(U5500_GIC_DIST_BASE);
cpu_base = __io_address(U5500_GIC_CPU_BASE);
} else if (cpu_is_u8500()) {
dist_base = __io_address(U8500_GIC_DIST_BASE);
cpu_base = __io_address(U8500_GIC_CPU_BASE);
} else
ux500_unknown_soc();
#ifdef CONFIG_OF
if (of_have_populated_dt())
of_irq_init(ux500_dt_irq_match);
else
#endif
gic_init(0, 29, dist_base, cpu_base);
/*
* On WD reboot gic is in some cases decoupled.
* This will make sure that the GIC is correctly configured.
*/
ux500_pm_gic_recouple();
/*
* Init clocks here so that they are available for system timer
* initialization.
*/
if (cpu_is_u5500())
db5500_prcmu_early_init();
if (cpu_is_u8500())
db8500_prcmu_early_init();
arm_pm_restart = ux500_restart;
clk_init();
}
static const char * __init ux500_get_machine(void)
{
return kasprintf(GFP_KERNEL, "DB%4x", dbx500_partnumber());
}
static const char * __init ux500_get_family(void)
{
return kasprintf(GFP_KERNEL, "ux500");
}
static const char * __init ux500_get_revision(void)
{
unsigned int rev = dbx500_revision();
if (rev == 0x01)
return kasprintf(GFP_KERNEL, "%s", "ED");
else if (rev >= 0xA0)
return kasprintf(GFP_KERNEL, "%d.%d",
(rev >> 4) - 0xA + 1, rev & 0xf);
return kasprintf(GFP_KERNEL, "%s", "Unknown");
}
static ssize_t ux500_get_process(struct device *dev,
struct device_attribute *attr,
char *buf)
{
if (dbx500_id.process == 0x00)
return sprintf(buf, "Standard\n");
return sprintf(buf, "%02xnm\n", dbx500_id.process);
}
static void __init soc_info_populate(struct soc_device_attribute *soc_dev_attr,
const char *soc_id)
{
soc_dev_attr->soc_id = soc_id;
soc_dev_attr->machine = ux500_get_machine();
soc_dev_attr->family = ux500_get_family();
soc_dev_attr->revision = ux500_get_revision();
}
struct device_attribute ux500_soc_attr =
__ATTR(process, S_IRUGO, ux500_get_process, NULL);
struct device * __init ux500_soc_device_init(const char *soc_id)
{
struct device *parent;
struct soc_device *soc_dev;
struct soc_device_attribute *soc_dev_attr;
soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL);
if (!soc_dev_attr)
return ERR_PTR(-ENOMEM);
soc_info_populate(soc_dev_attr, soc_id);
soc_dev = soc_device_register(soc_dev_attr);
if (IS_ERR_OR_NULL(soc_dev)) {
kfree(soc_dev_attr);
return NULL;
}
parent = soc_device_to_device(soc_dev);
if (!IS_ERR_OR_NULL(parent))
device_create_file(parent, &ux500_soc_attr);
return parent;
}
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